Download or read book Assessment of Physical Activity and Sleep Using Raw Accelerometry written by Paul Innerd and published by . This book was released on 2015 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Objective Monitoring of Physical Activity Contributions of Accelerometry to Epidemiology Exercise Science and Rehabilitation written by Roy J. Shephard and published by Springer. This book was released on 2018-06-09 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the new knowledge that has been gained from the objective monitoring of habitual physical activity by means of pedometers and accelerometers. It reviews current advances in the technology of activity monitoring and details advantages of objective monitors relative to physical activity questionnaires. It points to continuing gaps in knowledge, and explores the potential for further advances in the design of objective monitoring devices. Epidemiologists have studied relationships between questionnaire assessments of habitual physical activity and various medical conditions for some seventy years. In general, they have observed positive associations between regular exercise and good health, but because of inherent limitations in the reliability and accuracy of physical activity questionnaires, optimal exercise recommendations for the prevention and treatment of disease have remained unclear. Inexpensive pedometers and accelerometers now offer the epidemiologist the potential to collect relatively precisely graded and objective information on the volume, intensity and patterns of effort that people are undertaking, to relate this data to past and future health experience, and to establish dose/response relationships between physical activity and the various components of health. Such information is important both in assessing the causal nature of the observed associations and in establishing evidence-based recommendations concerning the minimal levels of daily physical activity needed to maintain good health.
Download or read book Assessment of Physical Activity with the CSA Accelerometer written by Lauren Elizabeth Chabot and published by . This book was released on 1998 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Activity Assessment written by Paul Innerd and published by Routledge. This book was released on 2019-07-10 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lifecourse research in physical activity tracks long-term trends in physical activity behaviours and gives an insight into the link between a physically active lifestyle and later-life health outcomes. However, the complexity of physical activity behaviours, and the analytical issues posed by lifecourse research, present researchers with real challenges in accurately assessing the relationship between lifelong physical activity and health. Physical Activity Assessment: A Lifecourse Approach is the first book to approach the assessment of physical activity for health from a lifecourse perspective and provide students and researchers with much-needed guidance on conducting lifecourse studies. The book provides readers with a thorough grounding in physical activity assessment from across the lifecourse perspective and evaluates current methods of measurement, including comparison studies, criterion methods, subjective assessment methods and physical activity monitors. It then goes on to offer guidance on the optimal measurement techniques of physical activity across the lifecourse, suggesting how data should be collected, analysed and quantified in light of modern technology and global connectivity, and what these methods mean for physical activity guidelines and interventions, and public health outcomes. Offering a unique and novel combination of theoretical grounding and quantitative research guidance, this is important reading for any students taking modules in physical activity measurement or physical activity and health, and any researchers conducting lifecourse physical activity studies.
Download or read book Assessment of Physical Activity from Raw Acceleration written by Jan Christian Brønd and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Physical Activity Using Wearable Accelerometers written by William F. Fadel and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many existing methods designed to measure physical activity in public health research. Traditionally, researchers use subjective methods like physical activity diaries and surveys to collect such data as they are relatively inexpensive. However, such methods frequently produce biased results due to the self-report nature of the data collection. In more recent years, wearable accelerometers, or actigraphy devices, have become the norm in physical activity research as they offer a noninvasive and objective measure of participants' daily movements. Accelerometers are relatively small devices that record high frequency time series measurements corresponding to the movements of participants. Analyses of the collected data are complicated by the fact that true physical activity is contaminated by a large amount of noise. Walking is often the only form of sustained physical activity in many populations, but other common daily tasks, such as driving a car, can mimic the walking signal. In our case study, we cover some of the basic features of accelerometer-based measurements, considerations we made when designing the Indiana University Walking and Driving Study, and cover some appropriate feature extraction methods to aid in differentiating between different types of physical activity.
Download or read book Implementation of Raw Accelerometry in Physical Activity Epidemiology written by Vincent Theodoor van Hees and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Energy Expenditure and Physical Activity Intensity Through Simultaneous Use of Heart Rate Monitoring and Accelerometry written by Monica M. Kirschner and published by . This book was released on 2012 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Study Participant Compliance on the Estimates of Physical Activity written by Ryan Patrick McGrath and published by . This book was released on 2015 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: To investigate the influence of accelerometer data simulations and adherence on estimates of sedentary behavior and physical activity, and the subsequent application of these data. Methods: A sample of 50 female (age=25.6+/-8.6 years) and 50 male (age=25.4+/-7.2 years) participants wore an accelerometer at least 22 hours/day for 7 consecutive days (raw data) to assess sedentary behavior, light physical activity (LPA), moderate-to-vigorous physical activity (MVPA), and average intensity of daily physical activity (DPA). A series of health markers were also measured. Reductions in accelerometer adherence were simulated by randomly removing 60 minute blocks of time during waking hours until each participant had 17-10 hours of data. Four different accelerometer data simulation techniques were tested by inserting "zeroes" or "dots" in the raw data to simulate accelerometer removals during sleep or waking hours. One-way ANOVA with Bonferroni post-hoc tests on mean estimates and absolute percent errors (APE) were used to analyze the differences between each accelerometer data simulation technique and adherence when compared to the raw data. The raw and simulated accelerometer data were then used in univariate regressions to predict each health marker that was measured, and the results were compared. Results: Participants averaged 23.3 hours/day of accelerometer wear, for a total of 687 days across all participants. Significant differences (p
Download or read book Validity of a Commercially available Low cost Wrist mounted Accelerometer in a Laboratory and Free living Environment written by Andrew T. Newton and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-cost, consumer-grade physical activity monitors may provide a more accurate measure of physical activity than subjective methods (e.g., self-report) while being less expensive than research-grade accelerometers or other objective methods. This study assessed the validity of a consumer-grade monitor (Movband 3) to measure physical activity intensity during treadmill exercise against previously validated measures of physical activity intensity: accelerometer counts (Actigraph GT1M), VO2, heart rate, ratings of perceived exertion, and treadmill miles. This study also examined Movband 3 reliability. Participants (N = 19) completed four, ten-minute treadmill stages (1.5, 3.0, 4.0, 6.0 MPH) while wearing one Movband per wrist and the previously-validated Actigraph monitor. There were large, positive effect sizes for the associations between Movband moves and Actigraph counts (r = 0.72), VO2, (r = 0.59), heart rate (r = 0.63), and RPE (r = 0.65). There was also a small, positive effect size (r = 0.27) for the association between moves reported by the Movband device worn on the dominant wrist and the Movband device worn on the non-dominant wrist. The low-cost, consumer-grade Movband accelerometer appears to provide a valid and reliable assessment of physical activity behavior/intensity. Physical activity monitors are a popular tool in the measurement of physical activity in the consumer market, but much of the existing validity evidence is lab-based. These monitors will typically be used by consumers outside of a lab setting. This study assessed the validity of a consumer-grade monitor (Movband 3) to measure physical activity intensity and behavior in a free-living setting against a previously validated measure of physical activity intensity (Actigraph GT1M). A separate aim was to assess the ability to the monitors to elicit changes in physical activity behavior. Participants (N = 16) wore the Movband and Actigraph devices simultaneously for a minimum of five hours per day across five days. Participants completed a 7-day Physical Activity Recall Questionnaire (PARQ) before and after wearing the monitors. There was a large, positive effect size for the association between Movband moves and Actigraph counts (r = 0.57). There was no significant difference (t = 1.323, p = 0.204) in total daily caloric expenditure from the seven-day Physical Activity Recall when the physical activity monitors were worn versus the previous week with no device. The low-cost, consumer-grade Movband accelerometer appears to provide a valid assessment of physical activity behavior/intensity in a free-living setting.
Download or read book A Systematic Review of the Methods Used to Measure Sedentary Behavior Physical Activity Energy Expenditure and Sleep Behavior Using ActiGraph GT3X and GT3X Accelerometers written by Jairo Hidalgo Migueles and published by . This book was released on 2015 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Objective Assessment of Physical Activity written by Jan Kühnhausen and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting Activity Type from Accelerometer Data written by Yonglei Zheng and published by . This book was released on 2012 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of physical activity is important in improving people's health as it can help people understand the relationship between physical activity and health. Accelerometers, due to its small size, low cost, convenience and its ability to provide objective information about the frequency, intensity, and duration of physical activity, has become the method of choice in measuring physical activity. Machine learning algorithms based on the featurized representation of accelerometer data have become the most widely used approaches in physical activity prediction. To improve the classification accuracy, this thesis first explored the impact of the choice of data (raw vs processed) as well as the choice of features on the performance of various classifiers. The empirical results showed that the machine learning algorithms with strong regularization capabilities always performed better if provided with the most comprehensive feature set extracted from raw accelerometer signal. Based on the hypothesis that for some time series, the most discriminative information could be found at subwindows of various sizes, the Subwindow Ensemble Model (SWEM) was proposed. The SWEM was designed for the accelerometer-based physical activity data, and classified the time series based on the features extracted from subwindows. It was evaluated on six time series datasets. Three of them were accelerometer-based physical activity data, which the SWEM was designed for, and the rest were different types of time series data chosen from other domains. The empirical results indicated a strong advantage of the SWEM over baseline models on the accelerometerbased physical activity data. Further analysis confirmed the hypothesis that the most discriminative features could be extracted from subwindows of different sizes, and they were effectively used by the SWEM.
Download or read book A Novel Analysis of Accelerometry Data written by Sixuan Wu and published by . This book was released on 2020 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerometers have been widely deployed to objectively measure and monitor physical activity and sedentary behavior in large epidemiological studies. The traditional summary metric, known as counts, summarizes raw high-resolution acceleration signals for a pre-specified epoch length (e.g., 1 minute). However, its definition is proprietary to device manufacturers, making it difficult to compare studies that use different devices. Alternative summary metrics have been introduced in recent years. This master thesis conducted a novel analysis of accelerometry data based on the activity index, a novel and transparent way to summarize the high-dimensional accelerometry data, among older women within the Women's Health Initiative. We first built calibrating equations of activity index for estimating metabolic equivalents (METs) and derive cutpoints to classify epochs into distinct physical activity intensity categories. We then utilized single variable and isotemporal substitution models to investigate associations of one or more physical activity intensity category and health outcomes, such as cardio-metabolic risk factors in the Objective Physical Activity and Cardiovascular Health (OPACH) Study. Further, we adopted a newly developed functional data analysis framework to quantify the dose-response relationships between continuous physical activity intensity and cardio-metabolic risk factors in the OPACH Study.
Download or read book Application of Methods in Physical Activity Measurement written by Stephen Herrmann and published by . This book was released on 2011 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is broadly accepted that physical activity provides substantial health benefits. Despite strong evidence, approximately 60% to 95% of US adults are insufficiently active to obtain these health benefits. This dissertation explored five projects that examined the measurement properties and methodology for a variety of physical activity assessment methods. Project one identified validity evidence for the new MyWellness Key accelerometer in sixteen adults. The MyWellness Key demonstrated acceptable validity evidence when compared to a criterion accelerometer during graded treadmill walking and in free-living settings. This supports the use of the MyWellness Key accelerometer to measure physical activity. Project two evaluated validity (study 1) and test-retest reliability evidence (study 2) of the Global Physical Activity Questionnaire (GPAQ) in a two part study. The GPAQ was compared to direct and indirect criterion measures including object and subjective physical activity instruments. These data provided preliminary validity and reliability evidence for the GPAQ that support its use to assess physical activity. Project three investigated the optimal h.-1 of accelerometer wear time needed to assess daily physical activity. Using a semi-simulation approach, data from 124 participants were used to compare 10-13 h.1 to the criterion 14 h.-1. This study suggested that a minimum accelerometer wear time of 13 h.d1 is needed to provide a valid measure of daily physical activity. Project four evaluated validity and reliability evidence of a novel method (Movement and Activity in Physical Space [MAPS] score) that combines accelerometer and GPS data to assess person-environment interactions. Seventy-five healthy adults wore an accelerometer and GPS receiver for three days to provide MAPS scores. This study provided evidence for use of a MAPS score for future research and clinical use. Project five used accelerometer data from 1,000 participants from the 2005-2006 National Health and Nutrition Examination Study. A semi-simulation approach was used to assess the effect of accelerometer wear time (10-14 h.d1) on physical activity data. These data showed wearing for 12 h.d1 or less may underestimate time spent in various intensities of physical activity.
Download or read book Identifying Threshold Values of Accelerometer Determined Moderate to Vigorous Physical Activity that Correspond to Self Reported Compliance to the 2008 Physical Activity Guidelines for Americans written by Julie A. Brier and published by . This book was released on 2016 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current public health guidelines for physical activity (PA) were primarily formulated using evidence collected from a series of prospective cohort epidemiological investigations that measured self-reported PA. In light of this observation, and the known discordance between self-reported and objectively-monitored PA, it remains common for researchers to assess compliance to current PA guidelines (e"150 minutes/week of an equivalent combination of moderate- and vigorous-intensity PA [MV2PA]) using objective-monitoring methods such as accelerometer-determined PA. However, investigations seeking to calibrate accelerometer-determined PA against self-reported compliance to current PA guidelines are scant within the extant literature. Calibration of objective-monitoring methods, such as accelerometer-determined PA, may prove fruitful in mitigating the discordance between self-reported and accelerometer-determined PA, while also providing compliance estimates for PA that better reflect a population associated health risks. Therefore, the purpose of this study was to identify optimal accelerometer-determined thresholds of MV2PA that correspond to 150 minutes/week of self-reported MV2PA outlined in the current 2008 Physical Activity Guidelines for Americans (PAGA). This study was a secondary analysis of 4,784 adults (18-64 years) from the 2003-2006 NHANES who provided e"4 valid days of accelerometer data. Receiver operating characteristic (ROC) curves were used to identify accelerometer-determined thresholds of weekly MV2PA corresponding to self-reported compliance to the 2008 PAGA. MV2PA in modified 10-minute bouts and total MV2PA were significant predictors of self-reported compliance to the 2008 PAGA (both p
Download or read book Frailty written by Jorge G. Ruiz and published by Springer Nature. This book was released on with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt:
